Line-X and Rhino are getting into the game so to speak, thanks for the links and input, I like the finished look of the roof from the Excel RV site is what I'm after. I figured there has to be a better cover on the roof than EPDM, they are too fragile IMO.
Monstaliner is my choice over Rhino though it does look like they are using a similar formula. The selling point for me is Monstaliner has to bend back on itself to chip or crack, it has that much elasticity but I've had a few years with it on our Jeeps and extreme Jeeping where they paint everything with ML, it gets put through some serious paces regarding flex and the only time I've seen it crack is when someone left their doors on...and rocked it. Hard.
Talked to their factory tech, he's had quite a few people call to order for the roof of their RV/TH units. What they've found as the best bond to the roof and side edging is to strip it down to the wood, put a good coat of varathane over it, scuff slightly with 600 grit and roll or spray it on. As long as the surface is scuffed it will adhere to it so I'm going to try the bedroom slideout first...smaller and cheaper to fix if it doesn't adhere very well. Since its as thick as EPDM there shouldn't be any problem clearing the seals. When talking about colors it was interesting - black would be a better color to use than white, it reflects more heat because of the polymers though a dark gray would look better to match the rest of the coach exterior colors.
Cost with Eternabond and bead caulk will run about 1K which isn't bad considering I can be as picky with it as I want, it won't look sloppy like the self leveling "goo" (dicor) and last years longer without having to check it every month or worry when a branch rakes the top.
We'll see, its an August project since that is the best weather to do it where I'll be staying at.